Are you located anywhere near Dharma Trading Company? It's not far from me.

I have no suggestions on the dye, though, I probably would have used a dark blue Sharpie!

I love Dharma dyes. I just finished a queen quilt for Husband and they were very helpful. I was using a Call of the Wild panel and I sent the Dharma people a link to it. I told them that I was trying to match the color of a particular section and they gave me exactly the right recommendation.

I did get a message back from the customer service department of the company (5.11) that made the two tactical polo shirts in question. They advise that the shirts, though 100% cotton, have been treated with a special "anti-fade" coating that would inhibit the dye from taking. That's it: closure on this issue.

It's more than a little bit ironic that these two new-with-tags shirts will now be relegated to the trash bin because their original color has been compromised around the collar due to sun exposure on display mannequins, and though they are 100% cotton, the "anti-fade" treatment applied by the manufacturer precludes my attempts at restoring the color through dyeing.

Before you throw them away, try a fabric marker. Or some Fountain pen ink. Hey, they're thrashed already, nothing to lose, right? I'm the crazy experimenter, as you can tell, lol.

I have not died anything but a friend has done it a lot to get the right color fabric for a specific costume she was designing. We had a white nurse dress that was made for another show. She wanted a forest deep green. She dyed it and it came out mint. She forgot that it was a polyester. Now whenever she mentions dying something I gently say to her remember "mint". We have dyed very little since